I spent a formidable part of my life as a heavy duty mechanic. A side bar to this video is, a broken truck is not a deal breaker but a price adjuster. I prefer to buy trucks that require some sort of repairs prior to being usable. I’ve bought my truck with blown bearings in the bull gear. A relatively simple repair. But a lot of guys figure dump the truck.

You need to do a video about equipment auction sabotages ,,,I know this is a trick(this is where you're at the auction and all the equipment is idleing people are checking them ou)this trick is from an old horse trader this is for older diesel equipment ,,,auctions every diesel engine at idle between the 200 300 RPM range (harmonic resonance)) you could find a point where you're idling it for that motor just knocks like hell once a idle Pointe was found he would set that equipment at that point if he wanted to buy it,,,, and other machines if didn't want to buy it he could find an idle Point with that motor sounded like a sewing machine,,,,,,, then every time somebody played with the idle on his prospective new machine he'd run back there and set that Idol making it knocked like hell,,,,, so when you're buying a quipment at all actions there's so many different ways people sabotage equipment I machine could have been idling for hours fine ,, so when time the auctioneer comes around they can't get it started ,,,, then after it's been sold The Saboteur un sabotage & it starts it up and drives his new machine to his stable,,,,,,, do a video on all the s*** people can do at all actions and how to spot it,,,,,, I'm an old diesel dog from lay back but I enjoyed your video and learned a few things new,,,, when you quit learning in life that means your dead lol

bought used 1997 e350 7.3. heavy gray smoke. esp when cold. i changed oil& filter every 69 days for 2 years. 2 years later it runs like a demon and no smoke. still change oil every 10 k miles. its got over 495 k miles and no problems and wil out pull every truck on the road up to 12/25/18

With my first truck, I bought it from my friend’s nephew. With being inexperienced I went with his word, which, worked out for me. The problems I have had with it was unforeseen, but, that c12 is a workhorse and I love CAT. Fast forward to today. Going to a dealer to look at my next truck and you have been a godsend to me. Going to do this to weed out the ones I am serious about, then, have a diesel mechanic set up to do an inspection on it. Thanks again for making this a little less stressful.

First thing I look for is where the air enters the cylinder at. If it enters at the top, I shy away. If it enters through a ring of ports just above bottom dead center and has to be pushed there by a roots blower, I'm in.

Thanks . I didnt think about rusted dip stick👍

Man I LOVE coming home to see that you've made a new video.

Never trust your buddy with your diesel or your old lady. He’ll sling a rod in both of them.

This is one of the best and thorough informational videos on the Diesel engine overall. Thanks so much👍🏽

Thank you sir for your help and knowledge on Diesel engine. Much appreciated

Just bought a 2000 Freightliner......1.3 million, in wonderful condition, has Destroit 12.7 in it that runs but it's getting on towards that time..... To build a scary motor, tee hee! I learn so much basic shit from your videos, and I've been doing this for almost fifty years, that I'd like to thank you.

Most all used equipment will need some type of service . It's about looking for signs of abuse and OD roll backs . He covered quite a bit in this video .

Great video as usual. A video on diesel engines for the marine industry would be good. I rebuilt my cat with borrowed manuals and i love the performance I'm getting. Balanced the crankshaft using race engine lathe and got an extra 10hp and 40nm torque. Also would be good for you to cover the various categories of use for marine appilcation. Ie heavy use vs easy use and life expectancy etc. Cheers

Great video, as always. You are such a library of knowledge

The older trucks will smoke upon startup. Old 70s and 80s will smoke blue or grey for a while if cold. I own a old 400 Cummins and it will smoke for 20 to 30 minutes or until it's warm and that's just how it is. I rebuilt mine around 40,000 miles ago and it will smoke when cold until it gets to 160° still and everything is new. Nature of the beast with these old engines especially when timing has been retarded or low compression pistons are installed like mine.

Good vid.. One thing I find is really good to listen to is the exhaust and the intake, listen for any cylinder that doesn't fire the same as the others, a rhythmic "ump" in the exhaust, or listening on the intake side maybe a rhythmic hiss of a leaking intake valve Always like watching a 'dep'dape vid

Wish I would've had this video a year ago. Bought a old Schneider truck that had coolant in oil but didn't know what to look for. Lasted little over a week b4 it died. This video will save a lot of people

I'am new here, Mr.Ape you have a very good show. I'am hard of hearing due to operating Locomotives the last couple decades, I can clearly hear you without issue. Thanks for sharing your knowledge with us. ✌️ Thank you Mr.Ape 👍

I bought a tractor, bloke said it didn't smoke, when i got it home i knew what i was in for as it had been sitting for 10 years in a paddock, well did it smoke? it blew more smoke than a steam train, the fix for blow by was put a piece of rag on the dipstick, the oil filter had never been changed in its life, i didn't need to change the oil as it used it like fuel, when it finally let go i found out the farmer used an angle grinder to clean up the weld on the cracked block between the cylinder bore, i had to get another block and i rebuilt the engine, also i had to take the radiator apart as it was blocked solid by dirt, now runs perfect.

Another great video from my favorite diesel you tube channel

There's only two reasons to get a used engine. One is to get that famous torque from 1100 to 1400 RPM that's only available on yellow engines. In which case, everything you mentioned applies. The other reason for a used engine... Revenge! A twin turbo 8v92 with straight pipes, mated to a 5 and a 4, is perfect for running passed the neighbor's house at 4 in the morning, after having been kept up all night by one of their famous Saturday night parties. In that case, who cares about how bad the engine is as long as it runs, and is extremely loud, and will rev to 2400 RPM. Just make sure to bump the governor before shifting. The neighbors have earned it.

We before we bought our kenworth t800 with a cat 3176 we test drove the carp out of it for three hours before we bought it and then we took it in the shop and crawd all arou d it with a light for leeks and made a list of thimgs wrong with it and told the dealer to fix it or back down on the price we also run a 3406 we love it as much as the 3176

Very useful video, thanks for the clear information. 👍🏼

Have gotten some good fuel mileage from the C7 CAT engine and the 500 HP DOUBLE D as WELL

So many people buy a truck or car and never open the hood. Obvious things like low oil and rusty coolant are easy to spot.

Thanks for sharing 👍🏿 Tell me could you please make a video on what to look for when buying a 24' box trucks 👍🏿

Ask and watch the dealer rep run when you want them to hookup and print out the ecm.

Is a good thing I didn't watch this before I bought my 07 ram 6.7... had a p2262 code. Issue was bent viens on the vgt replaced them for 200 bucks no more code running perfect! I'm just a backyard mechanic working on my own stuff..

Thanks for the great advice

Simply 1 of the best video on d engines

Josh I really dig your vids. I really do. BUT> Lets be honest. DPF is a bad joke on the working Man. This is the reason why I will not allow my Sons to buy a Kenworth with a accert engine. First reason 18:1.... You have to be kidding me? 18:1 plus twin turbos that spool up at 50 psi with lift a head. Second reason CO2 is plant food. How does all of these hippies think the oil got in the ground to begin with? Look I could go on and on.... I think your a very smart wrench. Keep up the good work.

Io need to take this guy truck hunting with me. Great information!

Thanks for making a sensible video!

Thanks for the info.

Great job, thanks!

I have a 1993 f350 idi when I bought it I didn’t know anything about Diesel engines ever since I remember had bad blow by and a rear mean seal oil leak I don’t really burn any oil It does smoke like crazy when cold and takes forever to get to temperature I guess I got lucky with the truck but I haven’t had that many problems with the old truck like I do with my 2006 Duramax

I have a test kit that checks for exhaust gases in the radiator, it is quick and sample.

What's the pros and cons cat,cummins,Detroit?

Very well done 👍 thx

Nice helpful video. Thanks

You fill my Brain lol Thank you. Soon to be on the road in a 2001 school Bus 366 turbo Cat.all good so for . thanks to your Video's help us pick the right Bus for the RV Build.

Great video. You are very experienced mechanic.

I love your site and advice just joined yesterday ive been looking to buy a 1998 thru 2002 chevy GMC 6500 rollback towtruck with the cat 3116 or the 3126 ive owned them before was years ago but they were great trks very easy to get used parts or new reasonable but there really getting hard to find reasonable were if it does need these things im buried in it so i found a 1998 chevy 6500 170k miles rollback the owner has had it for almost 11 years to transport cars to the auction so hes only put around 20k miles on it in all that time but the beds in great shape no rust interior is like new cabs dry its a eaton fuller 6 speed im fine with that actually have a spare sitting if needed so u no the truck O its a 3126 so heres the bad its smoking everywhere from all over under the hood when running now im over 300 miles away from this truck i no u cant give me any diagnosis when i personally haven't seen this truck just alot of pictures so my question is not about fixing it its about worse case motor swap i can buy 2002s gmc school buses this company has fleets and there selling them running driving home buses there automatics and there $2500 out the door so how do i tell horsepower or torque numbers is there a 3126 that u would want on your 1998 6500 if u were buying or building one i no rebuilt new is the way to go but in my situation rite now im on a budget i need a year so if i follow your advice from this video and i get the best one they have i no i have enough parts to make my truck a driver plus some extras like the rear the Alcoas with like new tires and its gotta return $600 in scrap when im done i really enjoy your videos and respect your knowledge you break it down into layman's terms makes it really easy to understand I just actually wondered if u were in my shoes what cat 3126 would u be looking for and its gonna be on the highway alot for power plus decent fuel sorry for this extremely long question i have a bad habbit of talking alot myself i hope u even see this hopefully u do either way keep up the great videos thanks again JOHN

Great Vid ! Thank you

Really good video thank you

Thank you...

Love your content brother! And are Big Cam Cummins a good motor? Looking at a strong runner in a cab over!! Be safe out there man and again thank you!

Hey Jay, Thank you for taking time to educate people like me that know little to nothing about Diesel engines. I have owned two diesel motorhomes with cummins 400 non def and current coach is a Cummins 450 with DEF. My question: I’m looking at 2 other older coach’s with 2007 CAT 350 rear rad.and the other has a 2006 400 CaT with side rad. Which of the Cat engines

I don't even have a diesel, now I'm scared to death to get a used diesel RV or truck. Thanks for the videos. (I quit pre-filling my oil filters)

Very nice!

so good media knowledge

I was told to hold the dipstick vertical to see how fast it drips off the stick, if it's diluted it will run faster, but needs to be done while the engine is cold. Does this have any merit?

What's your experience on tier 4 cat equipment like DPF?

Thank you.

Great video

Hi thanks for the great video. What about oil leaks on a diesel? And are Detroit Diesel engines are supposed to be one of the best diesel engine?

You got a new subscriber ..

Hey thanks for the video very informative and helpful I have a question I drive a 2015 International straight truck it has the n 13 engine buy Navistar with the def system what's your opinion on these engines I know the older maxxforce 13 what a pile of poo have you heard of people having the same issues with the newer def system on the N 13?

There are a few more rules when dealing with a used DPF engine: The failed DPF will damage the rest of the engine, so if you find a problem in a DPF engine be alert. The rise in backpressure destroys the turbocharger. In other cases, the turbocharger fails and the leaking oil ruins the DPF. If the engine does not use an injector in the exhaust system, it will inject extra fuel to get the DPF into active regen mode. If that happens too often, it wears out the piston rings and bores due to excessive unburnt fuel in the cylinder. Other times, the piston rings reach the end of their life, lead to excess oil consumption, and then clog up the DPF. I don't know how to separate all the different issues to solve the problem. Maybe you need a DPF, maybe you need to rebuild the whole engine and then replace the DPF. It really sucks that doing a compression test is either impossible or extremely time consuming on most modern diesels. 7:20 Diesel engines in many cars and pickup trucks always routed the blow by into the intake manifold or turbocharger. On the old ones, you could easily see where a hose was routed to the intake, then you could remove the hose and observe. 8:15 The other flaw in coolant test strips is that they don't tell you what type of additive package the coolant uses. Many years ago, Honda dyed their coolant green, and people would use the silicate based green antifreeze that was made for American cars. The result was water pumps failing too soon. There are other problems with the wrong coolant, but the example I used happened in my family. Gasoline or diesel, you must have the correct type of coolant and if applicable, coolant additives. Do any of you guys watch the "Powerstrokehelp" channel? People who own or work on diesel engines should also watch that channel even if they don't have a Ford or Navistar. 9:20 Excessive DPF active regen leads to excess fuel in oil if the engine doesn't use a fuel injector in the exhaust system. That is one thing that should be mentioned when you mention checking for excess fuel in the oil. It is extremely important.

Also brother I get my oil sampling done on a regular and every time they say it’s at acceptable lever Continue on next oil change is that normal I have a 2005/2006 MxsC15

Great channel.

Thank you

Hay love you videos, very informative. Which route do you think is best when it comes to a C15. 2007 out of frame overhaul (NSX) or 2006 out of parts yard (DSX, with paperwork showing overhaul)?

Thanks

Great Video ‼️….where is a Good place to have my C15 injectors Reman?

When my Detroit glider is cold it blows alot of blue smoke uses no oil. Blowby tube blows smoke when its cold out as well. Smells like burning oil. So i bought another 12.7 from factory . I have the same problem if i didnt know better they never took engine out. All bolt on components are the same from old engine bolted to new

Question. Do you have a video of running the overhead on the c15 engine

I run an old big cam with a turned up fuel pump black clouds everywhere I go below 1500 rpm but runs like a top

I have heard that adding winter diesel additive to your tank can cause white exhaust. Is that true?

I have a 2006 c7500 with 3126 cat it cranks and runs fine doesn't smoke at all has 123k miles x AT&T truck so governor at 68mph. It blows oil out of the blowby tube at a fairly high rate seams like something is putting pressure on the block checked turbo replaced crank vent filter. any help would be appreciated

My cat 3126b blows black smoke at lower rpm & can see some blow by out vent tube on cold days seems to be more than warmer days is this a issue ?!

I knew I bought a 2006 RV for a reason. No DPF or DEF. just a smooth cat!!!

I have a c13 my starter will click but won't start ,I have to click a few times and then she will.start, batteries are brand new, u think it might be the solenoid on the starter?

Do c15 s have more blow by then others? Twin turbos

I love u bro,God bless u

So a littel bit of white smoke coming out of the blow by tube isnt bad right on a 60 year old engine (perkins 4.236)

I have a Toyota 3L 2.8 blows no smoke except a little black underload ...no oil in coolant ..no coolant in oil...no leaks anywhere...goes great...but uses 1 litre of oil per 1000k...any ideas? PS fuel economy is good too 13 k's per litre for a slwb van.

Nice best video

I have a 1996 Freightliner fld. I have light smoke coming out of the oil dipstick. Is this bad?

White smoke or steam is a head gasket probability also

Do automatic trans only have dipsticks or do manuals ?

We just ended up rebuilding 3 engines. All 3406E. They all had around about 1.5 million miles. All water issues. Either sucking it in or blowing it out. Is that about right for lifespan of a good cat motor? The one motor with big horsepower numbers( turbo, injectors and a hot cam) was blowing it out but the others it was pulling it into the oil pan.

things i have repaired... 4 seals in oil cooler and power steering hoses. NOTHING ELSE!

Can you do a video on ABS??

Cruise control works for a minute sometimes.. then it cuts off. Sometimes it works for days on end without cutting out. Very strange. Replaced Speedo sensor on tail shaft. Still cuts out

Cat cummins or Detroit 60 for rvs…any thought…

What about using an automotive stethascope on a diesel?

Nice

MINE IS A 1979 3208 CAT. MY TRUCK HAS ALOT OF OIL COMING OUT IN EXCESSIVE SMOKE. I PUT A LONG HOSE REROUTING IT AND THE WHOLE ENG DEP IS DRENCHED IN BLACK OIL.

HELP new 2016 volvo rear drive shaft was out of PHASE . at 36000 miles it eat up 1st set of tires could not get dealer to fix after 79000 went to different dealer drive shaft out of phase . this truck shaking and even jump up and down . but how a vibration that is growing it is betting the rubber out of carry er bearing

Hell Diesel pros I own a 2006 F350 with a 6.0 powestroke I love the truck and I had no real problems other than some codes that Come on and I mostly ignore as it the past the codes won’t stop. I do need a mechanic to do real diagnostics and a real service. Any idea how to find a good Diesel mechanic in Jacksonville Florida?

Do you recommend a Cat, Cummins or Mercedes diesel engine? Which one is most cost-effective to repair? I'm looking to buy a 2007 or newer school bus and personally like the CAT C7 sounds.

forgot: i have replaced all the dual tires on rear 4 times and due again. front michlan tires are still good. wow. (see next comments)

Hmm , my 07 freightliner century had a c15 cat with no dpf system

Will you do a video on the right way to disable the EGR? It has been clearly established that the EGR significantly shortens engine life AND fuel economy all in the name of reducing NOX. Thanks.

Adept Ape what you think about glider kit?

How about an engine blowback where the oil cap is?

I have a 2005 w9 with a 550 acert ..my fan will stay on all the time if I don't unplug the AC compressor.. I brought it too 3 me shops and there best guess was to run a switch to manually engage the fan when it hits around 200 ..any suggestions on what it may be ..so far changed the fan hub/clutch and condenser..ended up running a switch so idk from here ..don't have the money right now to change the compressor..think it may be that?

I have a code 95 coming up so i replaced the sensor (intake valve voltage oil pressure high low ) ... every time my cat c-15 warms up the check engine light comes back on cuts my boost from 55 psi to 40 psi if you let the engine cool down the light goes out boost comes back I’ve checked all the wiring replaced the plug in don’t know what else to do ..... anyone seen this before ??????

I need a GM 6.2L engine for my 1987 Suburban V2500. Which rebuilders are reliable? Or is there a reliable source for a used engine?